[Cast] RTT clean-up to the max!

media/cast/sender/audio_sender.cc

Index: media/cast/sender/audio_sender.cc
diff --git a/media/cast/sender/audio_sender.cc b/media/cast/sender/audio_sender.cc
index 9d33bce196eb6e0b4e56f7a805ebd89f3c379965..df5d2cb8a4602f96311caa08321c3fc4c1b489c6 100644
--- a/media/cast/sender/audio_sender.cc
+++ b/media/cast/sender/audio_sender.cc
@@ -70,7 +70,8 @@ AudioSender::AudioSender(scoped_refptr<CastEnvironment> cast_environment,
       transport_config,
       base::Bind(&AudioSender::OnReceivedCastFeedback,
                  weak_factory_.GetWeakPtr()),
-      base::Bind(&AudioSender::OnReceivedRtt, weak_factory_.GetWeakPtr()));
+      base::Bind(&AudioSender::OnMeasuredRoundTripTime,
+                 weak_factory_.GetWeakPtr()));
 }
 
 AudioSender::~AudioSender() {}
@@ -145,7 +146,7 @@ void AudioSender::OnReceivedCastFeedback(const RtcpCastMessage& cast_feedback) {
   DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN));
 
   if (is_rtt_available()) {
-    // Having the RTT values implies the receiver sent back a receiver report
+    // Having the RTT value implies the receiver sent back a receiver report
     // based on it having received a report from here.  Therefore, ensure this
     // sender stops aggressively sending reports.
     if (num_aggressive_rtcp_reports_sent_ < kNumAggressiveReportsSentAtStart) {